Revisited rd_pick_intra4x4block
Revisited rd_pick_intra4x4block

Removed unnecessary copies.  No noticeable speed gains.


Change-Id: I996c50c23fedd06d54ee7a3e762cbf559cc4a9d1

turbulenz/libvpx,Topopiccione/libvpx,smarter/aom,mwgoldsmith/libvpx,enmasse-entertainment/libvpx,rikaunite/gst-opera_libvpx,goodleixiao/vpx,altogother/webm.libvpx,Distrotech/libvpx,charup/https---github.com-webmproject-libvpx-,vasilvv/esvp8,openpeer/libvpx_new,Suvarna1488/webm.libvpx,n4t/libvpx,mwgoldsmith/vpx,iniwf/webm.libvpx,matanbs/vp982,smarter/aom,kalli123/webm.libvpx,jdm/libvpx,webmproject/libvpx,rikaunite/gst-opera_libvpx,matanbs/webm.libvpx,liqianggao/libvpx,matanbs/vp982,cinema6/libvpx,matanbs/vp982,shyamalschandra/libvpx,VTCSecureLLC/libvpx,Suvarna1488/webm.libvpx,webmproject/libvpx,felipebetancur/libvpx,genesi/libvpx0,cinema6/libvpx,liqianggao/libvpx,Topopiccione/libvpx,webmproject/libvpx,reimaginemedia/webm.libvpx,Maria1099/webm.libvpx,rikaunite/gst-opera_libvpx,stewnorriss/libvpx,charup/https---github.com-webmproject-libvpx-,jacklicn/webm.libvpx,n4t/libvpx,pcwalton/libvpx,matanbs/webm.libvpx,shareefalis/libvpx,turbulenz/libvpx,thdav/aom,luctrudeau/aom,running770/libvpx,Distrotech/libvpx,Distrotech/libvpx,GrokImageCompression/aom,mbebenita/aom,kim42083/webm.libvpx,kim42083/webm.libvpx,kleopatra999/webm.libvpx,enmasse-entertainment/libvpx,genesi/libvpx0,turbulenz/libvpx,GrokImageCompression/aom,ShiftMediaProject/libvpx,abwiz0086/webm.libvpx,rikaunite/gst-opera_libvpx,altogother/webm.libvpx,ShiftMediaProject/libvpx,openpeer/libvpx_new,jdm/libvpx,gshORTON/webm.libvpx,shareefalis/libvpx,felipebetancur/libvpx,shacklettbp/aom,jdm/libvpx,Laknot/libvpx,thdav/aom,Topopiccione/libvpx,running770/libvpx,hsueceumd/test_hui,Acidburn0zzz/webm.libvpx,ittiamvpx/libvpx,altogother/webm.libvpx,kim42083/webm.libvpx,jacklicn/webm.libvpx,VTCSecureLLC/libvpx,charup/https---github.com-webmproject-libvpx-,Laknot/libvpx,charup/https---github.com-webmproject-libvpx-,zofuthan/libvpx,matanbs/vp982,WebRTC-Labs/libvpx,thdav/aom,mwgoldsmith/libvpx,kalli123/webm.libvpx,iniwf/webm.libvpx,luctrudeau/aom,zofuthan/libvpx,shyamalschandra/libvpx,ittiamvpx/libvpx,VTCSecureLLC/libvpx,GrokImageCompression/aom,goodleixiao/vpx,Distrotech/libvpx,running770/libvpx,Topopiccione/libvpx,jacklicn/webm.libvpx,hsueceumd/test_hui,gshORTON/webm.libvpx,felipebetancur/libvpx,iniwf/webm.libvpx,zofuthan/libvpx,openpeer/libvpx_new,pcwalton/libvpx,felipebetancur/libvpx,mwgoldsmith/libvpx,VTCSecureLLC/libvpx,lyx2014/libvpx_c,cinema6/libvpx,n4t/libvpx,shacklettbp/aom,shyamalschandra/libvpx,jmvalin/aom,lyx2014/libvpx_c,stewnorriss/libvpx,pcwalton/libvpx,jmvalin/aom,sanyaade-teachings/libvpx,gshORTON/webm.libvpx,Laknot/libvpx,iniwf/webm.libvpx,cinema6/libvpx,sanyaade-teachings/libvpx,sanyaade-teachings/libvpx,gshORTON/webm.libvpx,turbulenz/libvpx,hsueceumd/test_hui,GrokImageCompression/aom,abwiz0086/webm.libvpx,goodleixiao/vpx,Topopiccione/libvpx,openpeer/libvpx_new,goodleixiao/vpx,kalli123/webm.libvpx,awatry/libvpx.opencl,thdav/aom,felipebetancur/libvpx,matanbs/vp982,vasilvv/esvp8,jmvalin/aom,webmproject/libvpx,running770/libvpx,stewnorriss/libvpx,WebRTC-Labs/libvpx,genesi/libvpx0,turbulenz/libvpx,jdm/libvpx,sanyaade-teachings/libvpx,Topopiccione/libvpx,kim42083/webm.libvpx,liqianggao/libvpx,Suvarna1488/webm.libvpx,iniwf/webm.libvpx,kalli123/webm.libvpx,stewnorriss/libvpx,reimaginemedia/webm.libvpx,mwgoldsmith/libvpx,jacklicn/webm.libvpx,mwgoldsmith/vpx,mbebenita/aom,vasilvv/esvp8,kalli123/webm.libvpx,zofuthan/libvpx,n4t/libvpx,GrokImageCompression/aom,VTCSecureLLC/libvpx,rikaunite/gst-opera_libvpx,thdav/aom,ShiftMediaProject/libvpx,Distrotech/libvpx,abwiz0086/webm.libvpx,Laknot/libvpx,jmvalin/aom,genesi/libvpx0,Maria1099/webm.libvpx,pcwalton/libvpx,ittiamvpx/libvpx-1,Maria1099/webm.libvpx,awatry/libvpx.opencl,matanbs/vp982,shacklettbp/aom,matanbs/webm.libvpx,goodleixiao/vpx,mwgoldsmith/vpx,matanbs/webm.libvpx,Suvarna1488/webm.libvpx,Acidburn0zzz/webm.libvpx,smarter/aom,webmproject/libvpx,ittiamvpx/libvpx-1,shareefalis/libvpx,ittiamvpx/libvpx,vasilvv/esvp8,vasilvv/esvp8,matanbs/webm.libvpx,zofuthan/libvpx,liqianggao/libvpx,shyamalschandra/libvpx,kleopatra999/webm.libvpx,zofuthan/libvpx,reimaginemedia/webm.libvpx,thdav/aom,n4t/libvpx,lyx2014/libvpx_c,ittiamvpx/libvpx-1,ShiftMediaProject/libvpx,running770/libvpx,jmvalin/aom,Acidburn0zzz/webm.libvpx,kleopatra999/webm.libvpx,shacklettbp/aom,awatry/libvpx.opencl,mwgoldsmith/libvpx,ittiamvpx/libvpx,turbulenz/libvpx,Acidburn0zzz/webm.libvpx,matanbs/vp982,cinema6/libvpx,ittiamvpx/libvpx-1,shyamalschandra/libvpx,jdm/libvpx,enmasse-entertainment/libvpx,ittiamvpx/libvpx,webmproject/libvpx,stewnorriss/libvpx,shareefalis/libvpx,Suvarna1488/webm.libvpx,luctrudeau/aom,running770/libvpx,openpeer/libvpx_new,mbebenita/aom,lyx2014/libvpx_c,enmasse-entertainment/libvpx,cinema6/libvpx,Suvarna1488/webm.libvpx,liqianggao/libvpx,altogother/webm.libvpx,jmvalin/aom,gshORTON/webm.libvpx,mwgoldsmith/vpx,genesi/libvpx0,lyx2014/libvpx_c,altogother/webm.libvpx,kalli123/webm.libvpx,abwiz0086/webm.libvpx,iniwf/webm.libvpx,Distrotech/libvpx,luctrudeau/aom,ShiftMediaProject/libvpx,Maria1099/webm.libvpx,smarter/aom,Acidburn0zzz/webm.libvpx,ch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